【摘要】 为进一步挖掘甜菜种质资源潜力促进甜菜品种改良及种质资源的高效利用,利用软件SPSS 22.0采用聚类分析方法对从中国甜菜种质资源中期库中筛选出的121份国内外甜菜种质资源进行了遗传多样性研究和分类。结果表明:对9个叶部形态性状进行了调查分析,其中多样性指数最高的是叶片薄厚,然后依次为叶色、叶柄长、叶面形、叶柄色、叶缘形、叶柄宽、和叶柄厚,多样性指数最低的为叶形;基于各种质间叶部性状的遗传差异,在遗传距离为12.5时将来自不同国家的121份种质资源分为4大类。第Ⅰ类群甜菜种质资源主要来自中国、美国、意大利和比利时,第Ⅱ类群甜菜种质资源主要来自俄罗斯、美国和中国,第Ⅲ类群甜菜种质资源主要来中国、美国、俄罗斯和比利时,第Ⅳ类群甜菜种质资源主要来自中国、意大利、美国、比利时和俄罗斯。聚类结果表明,不同国家的种质资源多样性较丰富,充分了解了甜菜种质资源叶部性状遗传多样性地理分布特点和种质资源群间的遗传关系,对于鉴别特异种质,挖掘优异种质材料具有现实意义。更多还原

【Abstract】 Both morphologic traits and agronomic traits of 121 sugar beet germplasm resources from home andabroad were studied on genetic diversity and cluster analysis to exploit the potentialities and promote thebreeding of new cultivars and effective application of germplasm resources. Results showed that theinvestigation and analysis of 9 leaf morphological characters indicated that the diversity index of leaf bladethick was the highest, followed by leaf color, petiole length, leaf surface shape, petiole color, leaf margin shape,petiole width, petiole thick, and the least was leaf shape. Based on the genetic differentiations of leaf traits, 121 sugar beet varieties were divided into 4 groups by cluster analysis of leaf traits at 12.5 genetic distance bysoftware SPSS 22.0. There were plenty of variations among varieties from different countries. Group Ⅰ of beetgermplasm resources mainly came from China, United States, Italy and Belgium; group Ⅱ of beet germplasmresources mainly came from Russia, United States and China; group Ⅲ of beet germplasm resources mainlycame from China, United States, Russia and Belgium; group Ⅳ of beet germplasm resources mainly came fromChina, Italy, United States, Belgium and Russia. To fully understand the leaf character distributioncharacteristics and the genetic diversity of beet germplasm, and the genetic relationship among the groups ofgermplasm resources has practical significance to identify specific germplasm and mining the excellent germplasm material.更多还原